Driving mechanism for combing machines



Feb. 13, 1923. Pi A. HELMBOLD. I

DRIVING MECHANISM F OR COMBING MACHINES.

FILED SEPT. 14. 1920.

Patented Feb. 13, 1923.

en ti DRIVING MECHANISM FOR COMBING 'i arciiinns.

Application filed September 14, 1920. Serial No. 410,136.

To all whom it may concern Be it known that I, PAULirUGUsrn HELM- BULD, a citizen of the French Republic, residing at Vohwinkel, Rhineland, Germany. have invented a new and useful Improvement in Driving Mechanism for Combing ll'lElClliIlQS, of which the following is a specification.

The subject matter of the present invention is a driving gear for the drawing-off roller of combing machines of the Heilmann type, and the novelty of the said gear consists in that, by means of toothed wheels of different sizes mounted on a shaft which is rotated by ratchet wheels or cog-discs mounted on the same shaft and cooperating paw s, the drawing-0E roller is driven in such a manner that it has imparted toit alternately a forward movement and a slower backward movement. The rotation of the shaft is suitably effected by means of actuating mechanism which in its simplest form consists of an arm. ,mounted on the shaft and an elbow rod which couples the said arm to the driving crank. Between these there may be a pause during which the drawing-off roller stands still.

An embodiment of the invention is illustrated in the accompanying drawing, in which Fig. 1 is a side elevation, and

Fig. 2 a plan view of the gear.

111 this drawing d is a shaft which carries a driving crank e and is rotated by means of gear wheels 6 and 0 from the shaft a of the circular comb. The crank e is connected to a rod f by a pin w, and the said rod is coupled by a pin a to a connecting rod 9 fixed on a shaft 72. A small ratchet wheel h is fixed on this shaft, and a pawl a which is pivoted on a toothed wheel 70' is engaged therewith. This wheel 70 rotates free on the shaft 79 and gears with a toothed whee-l Z which is fixed on the shaft t of the drawing-off roller and is half the size of the wheel 70. Rotation of the shaft p to the right by the mechanism d, f, 9 thus effects through the intermediary of the pawl z and the wheel la the corresponding quick forward rotation of the drawing-off roller shaft t.

The shorter movement in the opposite direction is brought about by the following means. On the shaft 3)- another ratchet wheel m is mounted to rotate free thereon; the said wheel forms part of a toothed wheel r, and a pawl 71 in the form of a two-arme :l lever engages with it. which lever-is pivoted on a disc 9 that is fixed. on the shaft p. The wheel 1' gears with a wheel a of the same jsize mounted. on the shaft 75 of the drawing-off roller, and during the rotation of the shaft p to the left-the pawl engages the ratchetgwheel m and drives the wheels 1, s so that the shaft 25 is rotated backwards in the opposite direction to that in which it is ldriven by the pawl i and ratchet wheel 7L and at half the speed. This rotation backwards takes place approximately during the first three-fifths ofthe rotation of the crank e, and the forward rotation of the shaft it twice quickly during the last twofifths. In order to permit of this reverse rotation, the pawl n is put out {of action at the commencement thereof by its outer arm coming in contact with a roller 0 carried by a spring bracket 0. [The motion of the drawing-off roller is such that its forward movement takes place while the crank is traversing approximately two-fifths of the crank circle; and the remaining portio-n is so utilized that it is again approximately halved and for a little more than one fourth of the whole circle the drawing-01f roller stands still, while the other fourth corresponds to the backward movement. For that purpose the connecting rod f isnot made straight and in one piece butconsists of two parts f and f which are pivoted to each other by a pin a; and pivotally connected at u with a thickened portion 9'' of the oscillating arm 9. The result of this is that for the forward movement of the drawing-ofi' roller and :when the crank e is rotating in the direction of the arrow the almost straight-stretched rod 7, f exerts a pulling action. When the crank reaches the dead centre, the two parts f, f of the connecting rod pivot on the pin 4) under the pushing action of the crank c, with the result that there is lost motion and the drawing-off roller stands still until the part at of the rod 7, f strikes against the thickened portion of the arm 9. Thereupon the rod f acts upon the swinging arm 9 with a. leverage shortened by the distance from u to o, anu thereby the actuating mechanism is brought back to its starting position notwithstanding the shorter path of the crank and during this movement the rearward movement of the drawing-off roller is obtained. The unequal oscillation of the shaft 39 may if desired be effected in other ways.

g wee-n77 WVhat I claim is 1. Driving mechanism for drawingotl roller of a coil comprising in combination a s;- t rotatably mounted parallel to the axis of the drawin oi roller, a gear wheel mounted loose on t said shaft and in gear wit-h a wheel of 1 diameter which is connected rigi y min the drawing-off roller, another ge wl eel mounted loose on the said shift and in g ar with a wheel of "equal d' which connected rigidly to the di a pair of ratchet wheels of ters fixed on the said shaft c on the loose gear wheel first referred to and engaged with the smaller ratchet wheel, an oppositehv-acting; pawl mounted on a disc fixed on the said shaft and adapted to engage the other ratchet wheoL inea-ns actuated from the continuously rotating coinh cylinder for oscillating the said shei't means for putting out of action the second pawl referred to when the other pawl is in action.

2. Driving mechanism for actuating the drawing-oil rollers of combing machines comprising in combination a constantly ro tating; credit: geared to the comb shalt" connecting rod pivotally mounted on the crank pin and consisting of two pivot-ally connected parts out of alignment with each othen a rotatably mounted parallel. to the axis rotation of the said crank, an arm fixed on the said shaft and pivotally connected at its free end to the said connect in rod pair of wheels of different ZQS mounted loose on the s id shat: and in with correspo ding wheels fixed on the drawing-old roller shaft, loose ratchet wheel and a fixed ratchet wheel mounted on the shaft which carries the said pair of loose gear wheels, a pawl pivoted on one of the said loose wheels and actin upon the fixed ratchet wheel, and a second pawl pivoted on a disc fixed on the said shaft and acting upon the loose ratchet whee PAUL AUG'USTE HELMBOLD.

*Witnesses Demon C. VVooDs, PAUL LONGARCKELL, 

